STPS340AFN Equivalent & Substitute Parts Reference

Part Overview

STPS340AFN is a Schottky diode in the Diodes, Rectifiers category, originally manufactured by STMicroelectronics. It is specified as a 40 V, 3A surface-mount device in a DO-221AC, SMAflat Notch package, supporting fast recovery operation. The product status for STPS340AFN is obsolete, making sourcing for new designs or replacement purposes necessary. Users requiring ongoing availability or compliance with inventory needs must consider substitute models with matching electrical and mechanical parameters.

Substiute Parts

STPS340AFN

STMicroelectronicsIn Stock: 1178STPS340AFN Datasheet

Current PartRFQ

STPS340UF

STMicroelectronicsIn Stock: 7894STPS340UF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution is determined strictly by the following electrical and mechanical parameters: technology (Schottky), maximum reverse voltage (40 V), average rectified current (3A), forward voltage (630 mV @ 3 A), reverse leakage current (20 µA @ 40 V), fast recovery speed, mounting type (surface mount), package type (DO-221), supplier device package, and compliance specifications (RoHS3, REACH, MSL, ECCN, HTSUS). Only parts matching these parameters in all respects are listed as possible substitutes.

Parameter Comparison

Engineering Selection Recommendations

STPS340AFN is categorized as obsolete. Substitute selection is based on maintaining product compliance with ROHS3, REACH unaffected status, and unlimited moisture sensitivity level (MSL 1). Substitute parts must match regulatory certifications (ECCN, HTSUS) and exhibit compatible product status. STPS340UF, the manufacturer-recommended substitute, satisfies these requirements and maintains active inventory levels.

Frequently Asked Questions (FAQ)

Q: What determines if STPS340UF can substitute for STPS340AFN?
A: Substitution is defined by identical key electrical parameters (technology, voltage, current ratings, switching speed), compliance requirements (ROHS3, REACH, MSL), and closely matching mounting and package styles.

Q: Are package differences significant for substituting STPS340AFN with STPS340UF?
A: The substitute part, STPS340UF, uses a comparable surface-mount flat leads package (DO-221AA, SMBflat). Users should ensure mechanical compatibility with their application regarding pad layout and case form factor.

Q: Are all certification and compliance statuses maintained with the substitute?
A: Both STPS340AFN and STPS340UF are ROHS3 compliant, REACH unaffected, and have unlimited moisture sensitivity levels, preserving standardized compliance in the substitution.

Q: Is it necessary to requalify the substitute in inventory-controlled or regulated designs?
A: Substitute selection follows compliance, certification, and inventory criteria. Application-specific qualification should reference only documented parameters from the components listed above.

Q: Does switching from an obsolete to an active part change electrical performance?
A: As all listed electrical characteristics are identical, electrical performance consistency is maintained between STPS340AFN and STPS340UF within the specified parameters.